1. After 9/11, President Bush decided to preemptively attack Iraq before they could help al Qaeda launch another attack on the US, though Iraq had no involvement in 9/11. 2. The US invasion of Iraq in 2003 was based on faulty intelligence that Iraq possessed WMDs, though none were found. 3. By 2008, violence in Iraq had decreased significantly from its peak a few years prior, but the situation remained fragile. US troops aimed to train Iraqi forces to defend themselves so US troops could eventually withdraw.